6/3UF underground, which wire is needed to transition above ground

[DTL504]

I have 50FT of gray 6/3 UF from the detached garage subpanel going approx 18" underground into 1 1/2" conduit to the back of my house which is brick with crawl space. The easiest way to the main panel is to bring the cable into the attic and feed it down into the wall into the main panel. My 6/3 UF ends about 6ft above ground. I am adding a 4x4x4 junction box for a splice to transition to the appropiated wire and continue the run up the back wall to the top gable into the attic using a 1/ 1/2" LB then to the main panel crossing the beams and through the bedroom interior wall where the main panel is located. What option/s do I have to continue the run from the the outside wall to the main panel inside the house

 

[BigJohn20]

On the outside wall you can either do conduit with individual conductors or more UF.

Once inside the house, I'd transition over to 6-3 NM-B WG since it's easier to work with. If you really wanted to and had the wire, you could go to the panel with UF.

 

[DTL504]

1. If I continue the splice with more 6/3 UF when going into the attic can it be loose like NM and staple to the rafters or do it have to be in conduit to the main panel?
2. If I used THWN can I run it in conduit to the top of gable thru an LB and loose to the main panel?

Thanks

 

[BigJohn20]

1. If I continue the splice with more 6/3 UF when going into the attic can it be loose like NM and staple to the rafters or do it have to be in conduit to the main panel?
2. If I used THWN can I run it in conduit to the top of gable thru an LB and loose to the main panel?

Thanks

Once UF is in the house, it IS NM cable.

340.10 Uses Permitted. Type UF cable shall be permitted
as follows:
(4) Installed as nonmetallic-sheathed cable. Where so installed,
the installation and conductor requirements
shall comply with Parts II and III of Article 334 and
shall be of the multiconductor type.

THWN must be run in conduit.

 

[DTL504]

Thanks,
I guess its bes/cheaper to continue with the 6/3 UF to the main panel.

 

[kngelv]

This does not sound like an easy path. You should really try and find a more direct route. A 4x4x4 box will be a little tight for a splice point. If you can use a 6x6x6.

James

 

[DTL504]

This is the easiest route. Coming from the crawl space would be painbful. My current plan of action is the most direct path. I would explore the option of the 6x6x6.